Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea3158bbe0688e2…

MALICIOUS

PDF

73.2 KB Created: 2021-03-12 06:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e1d06d72e43a39e94a64ea2289753e0e SHA-1: 47644232e87cc03c9d9fdd8d5523052adfe0e64e SHA-256: 8ea3158bbe0688e2e1243c9d042257a110a1e2528389c517184d52a85097c658
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it's part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=junie+b+jones+spanish+pdf PDF link annotation
    • https://cdn.sqhk.co/ropobemuma/Vh2gcqV/new_york_city_night_day_producer.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/ijTrjc4/papomisizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_603bee9bebbdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_60256d593ad68.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/iiIvhhU/giponiputefivadewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_60278e6f997a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/somisilegex/diabetes_mellitus_type_2_treatment_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/31586642297.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_4d82eadad6ec41ef8900b8f1bce65f2e.pdf?index=trueIn PDF document text
    • http://ravuxigud.epizy.com/guided_tour_churchill_war_rooms.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/2492758158.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/themes_powerpoint_2010_keren.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_331340a40927405b819e51f63210c950.pdf?index=trueIn PDF document text
    • http://wajiletum.epizy.com/sijewot.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/answerphone_song_banx.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_28ba4e14b20b42508da049da0572d7d7.pdf?index=trueIn PDF document text
    • http://wulumafagupiw.rf.gd/jufafoferuwubif.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/uc_mini_apk_jio_mobile.pdfIn PDF document text
    • http://javuxanasojajex.epizy.com/walmart_black_friday_days_and_times.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/84441247906.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/incursions_crossword_answer.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 5208 bytes
SHA-256: 3fc7528102e6376ea0d7ddb7a20802f22a0e4714f0a273f10b32d4137874b62e
font_01_sfnt_off0000f46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 10312 bytes
SHA-256: 4eabeeeee558e4de25c5c968993866ec30967f89544ce045b6bf06a0a4c6b7c4

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